"My word of honour, sir. If I break that I would be as likely to break an oath."
"Very well," said Beresteyn after a moment's hesitation during which he tried vainly to scrutinize a face which he had already learned was quite inscrutable. "Shall we arrange the mode of payment then?"
"If you please."
"How to obtain possession of the person of the jongejuffrouw is not my business to tell you. Let me but inform you that to-day being New Year's day she will surely go to evensong at the cathedral and that her way from our home thither will lead her along the bank of the Oude Gracht between the Zijl Straat where our house is situate and the Hout Straat which debouches on the Groote Markt. You know the bank of the Oude Gracht better than I do, sir, so I need not tell you that it is lonely, especially at the hour when evensong at the cathedral is over. The jongejuffrouw is always escorted in her walks by an elderly duenna whom you will of course take to Rotterdam, so that she may attend on my sister on the way, and by two serving men whose combined courage is not, of course, equal to your own. This point, therefore, I must leave you to arrange in accordance with your desire."
"I thank you, sir."
"In the same way it rests with you what arrangements you make for the journey itself; the providing of a suitable carriage and of an adequate escort I leave entirely in your hands."
"Again I thank you."
"I am only concerned with the matter itself, and with the payment which I make to you for your services. As for your route, you will leave Haarlem by the Holy Cross gate and proceed straight to Bennebrock, a matter of a league or so. There I will meet you at the half-way house which stands at the cross-roads where a signpost points the way to Leyden. The innkeeper there is a friend of mine, whose natural discretion has been well nurtured by frequent gifts from me. He hath name Praff, and will see to the comfort of my sister and of her duenna, while you and I settle the first instalment of our business, quite unbeknown to her. There, sir, having assured myself that my sister is safe and in your hands, I will give over to you the sum of 1,000 guilders, together with a letter writ by me to the banker Ben Isaje of Rotterdam. He knows Jongejuffrouw Beresteyn well by sight, and in my letter I will ask him, firstly, to ascertain from herself if she is well and safe, and secondly to see that she is at once conveyed, still under your escort, to his private residence which is situate some little distance out of the city between Schiedam and Overschie on the way to Delft, and lastly, to hand over to you the balance of 3,000 guilders still due then by me to you."
He paused a moment to draw breath after the lengthy peroration, then, as Diogenes made no comment, he said somewhat impatiently:
"I hope, sir, that all these arrangements meet with your approval!"